RENUS Professional grade scientific calculator,Easily handles 1 and 2 variable statistical calculations, three angle modes(degrees,radians, and grads), and scientific/engineering notation modes,Perfect for High School and College math. Calculation records can be read ,it will reduce double-counting and improve working efficiency. 2-line,12-digit widescreen HD display support superscripts function,Facilitate our calculations AAA battery replaces button batteries,If you need to replace the batterys, just open the battery cover on the back without any tools.(batteries include) Ergonomically designed hard sliding cover can protects the calculator and also provide a comfortable grip